Duplex fountain-pen.



s. GREENFI'ELD. DUPLEX FOlLNTAIN PEN. APPLICATION FILED SEPT. 20, I9l6.

Patented May 7,1918.

SIMON Ci-REENTFIELD, OF N YORK, N. Y.

DUPLEX FOUNTAIN-PEN'.

Specication of Letters Patent.

Patented May 7, 1918.

Application filed September 20, 1916. Serial No. 121,184.

To all whom t may concern: n l

Be it known that I, SIMON GREENFIELD, a citizen of the United States, residing at N ew-York, in the county of New York and State of New York, have invented new and useful Improvements in Duplex Fountain- Pens, of which the following is a specification.

This invention relates to `improvements in fountain pens provided with independent containers within its barrel. This provides for two kinds of ink in the same holder of a fountain pen. The ordinary type of fountain pen canbe used with one color of ink, whereas in this invention two distinct and different colors of ink may be used in the same pen, without emptying and refilling the pen for the different colored inks.

Consequently, the main object of the invention is to provideI a pen, containing two different colors of ink, each of which can be utilized at the pleasure of the user, by manipulating a release valve.

Another object is to provide a fountain pen, with a coupling piece, acting as a coupling between the main barrel and a two sectional feeder allowing two colored inks t iow freely. In appearance, this fountain pen is similar .to an ordinary fountain pen, and filled in the same manner.

These and other objects are attained by the novel construction and combination of parts, hereafter described and shown in the accompanying drawing, forming a material part of this specification, and in which Figure 1 shows a longitudinal section through the center of complete fountain pen and cover. This section is taken through a plane perpendicular to the partition in the main barrel.

Fig. 2 shows a side elevation, broken away, tion.

Fig. 3 shows a cross pen at 3 3 of Fig. 1.

Fig. 4 shows another cross section through parts being and parts being shown in secsection through the the pen at 4-4 of Fig. 2.

Fig. 5 shows a side view of the coupling means and sectional feeder located in the upper portion of the fountain pen.

Fig. 6 is a cross section through the side view of Fig. 5, taken through 6 6 and' shows the ink releasing mechanism.

Fig. 7 lshows an elevation partly broken away.

Fig. 8 is across sectional and plan view of Fig. 7, taken through 8 8. l

Fig. 9 is a cross section through 9 9 of Fig. 1 showing the two ink passages and Fig. 10 is a longitudinal section through the coupling piece.

Fig. l1 is a longitudinal section, through the cover' of the pen.

Fig. 13 is a section taken on line 13 13 of Fig. 11.

Fig. 12 shows a view msm.

Fig. 14 is a view at right angles to that of Fig. 12.

This fountain pen is not only an ingenious and novel construction, but also can be very easily manipulated. In Fig. 1 is seen the main outer construction of an ordinary fountain pen, consisting of the main barrel 15, divided into `two chambers, coupling piece 20, sectional feeder 18, pen point or nib 17, and cover or cap 28.

The barrel 15 of the pen is sectioned into two chambers 13 and 14, by a thin partition or sectional wall 16 which widens out at 26 at the top. This widened portion containsa recess or cavity 3l. n auxiliary holder or coupling means is threaded to the upper end of the barrel 15 at 21. Sectional feeder 18 is contained within coupling piece 20. This feeder has a small wall extension 27, which fits perfectly into cavity 31 of wall 16. he coupling piece 20 is therefore used to connect sectional feeder 18 to main barrel 15 of the pen at junction 31. pen into two distinct units.

Within the feeder 18 are two passages or channels and 32, independently connected to the two chambers 14 and 1'3 of the main barrel 15. These barrels provide the different colored inks which flow through 0f the release mecha-- These channels or runways 30 and 32 cannot How at the same time. When one color ink Hows through 30, the other colored ink is held back cylindrical valvey 19 rotatively arranged in the feeder section 18 in a plane at rightangl'es to lthat of the channels 30 and 32.

he radius of the cylindrical valve 19 is slightly greater than the diameter of the channels 30 and 32, and the position of the cylindrical valve w1th respect to these channels is such that the vertical plane of its longitudinal center lies outside the circumference of said channels, so that said channels lie in a plane that falls to one side of at 32, by means of a. solid.

.flow through the longitudinal center of said cylindrical valve, and extends to the circumference thereof. rI`his valve is provided with transverse notches 24: and 25 cut into it insuch a manner as to allow ink to ilow from one channel while the other is closed. i This is done by placing notches 24 and 25 located on the periphery of the rod opposite each other, while channels 30 and 32 are in the same line. By turning the release valve a half turn,'notch 24: will allow ink to passage 32 while the ink flowing through 30 is checked. Fig. 6 shows the notch 25 of the valve in line with the passage 30; while passage 32 is checked as shown. l

By revolving release knob another half be in line with 30, allowing the ink to flow through passa e checkin flow through 32. two di erent color inks can be obtained from two independent channels 13 and 14, within the same barrel. Release point 23 has two indicating points located on opposite sides of the periphery of the knob and in line with one of the ink passages.

'lhe end of the cap or cover 28 is interiorly screw threaded in order to be removably engaged as at 29 with the coupling or auxiliaryy holder 20, the outer periphery of which for this purpose is provided with cooperating screw threads.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent is v 1. In a fountain pen, the combination With a main barrel open at one end and divided by a partition into two separate longitudinal ink reservoirs, said partition being widened out for a distance adjacent the open end, and said widened portion having a longitudinal cavity provided therein, a one-pen feeder section having two independent channels lon 'tudin'ally therethrough arranged at one end to communicate respectively with said reservoirs and converging toward the other end of the section to feed the single pen, a rigid extension rising between said channels of the feeder section and adapted to engage said longitudinal cavity whereby to hold the said channels in proper operative registry with said reservoir, means for exteriorly connectin the feeder section with the main barrel, an disposed in the feeder section transverse the channels thereof and adapted to close said channels independently.

2; In a fountain pen,

this manner,

the combination between said channelsto Lacasse with a main barrel having an open end and divided by a partition into two reservoirs, said partition being widened outv for a distance near the open end and having provided in said widened portion a longitudinal cavity, a one-pen feeder section provided with two independent channels therethrough spaced at one end to communicate respectively with said lreservoirs and converging toward the other end to feed the single pen, means combined with said feeder section and adapted to removably engage said longitudinal cavity to connect the feeder section with the main barrel with the feeder channels held positively in operative registry with said reservoirs, a cylindrical valve the radius of which is greater than the diameter of said channels rotatively seated transversely in said feeder section in such manner that the channels thereof are intercepted and closed in a plane falling to one side of the longitudinal center of said cylindrical valve and extending to the circumference thereof, notches cut transversely in the diametrically opposite sides of the periphery of said valve and spaced longitudinally thereof for a distance equaling the space between said feeder channels at that point, exterior means for rotating said valve so that when one channel is closed the other will be open, and indicator means combined with said exterior means to indicate when the respective channels are opened or closed.

y 3. In a fountain pen, and in combination with a one-pen feeder section thereof having independent channels extending longitudinally therethrough, a cylindrical valve having radaii of greater length than the diameter of said channels rotatably arranged transversely in said feeder section with the vertical plane of its longitudinal center lying to one Side of the parallel vertical plane of said channels in such manner that the periphery of the cylindrical valve between its longitudinal center and circumference will intercept said channels, transverse notches cut upon the diametrically opposite sides of the periphery of said valve at a spaced distance equalin the distance enab ethe valve to open one ychannel while the other is closed, a head on said cylindrical valve exterior of the feeder section for the rotation.of the same, and means combined with said headb to indicate which channel is open or closed. In testimony` whereof, I have signed my name to this specification.

SIMON GREENFIELD.

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